> keyboard controller for it. i will also want to link the new
> controller to a drum machine in a way that each drum sound will
> trigger a different synthcart sound, thereby giving it some
sequence
> ability. im still trying to figure out the best way to do this. my
> initial experiments using relays were iffy, so the quest continues.
> Im open to suggestions if anyone thinks they can help.
> thanks-
> djdsl

Hey,

My idea for the sync output would somekind of emulation of the
keyboard controllers. The atari scans the ports so if a box could
output the same kind of signal as a pressed keypad does then you
could control it remotely. If you you a chip emulating the circuit
controlls I assume it would be possible to take it a step further and
make it midi controlable. It would work kinda like this ...


http://www.paia.com/midibrn.htm

could control voltages be tweaked to work on the kyboard interface?


http://www.atari7800.org/schematics/keypadschematic.gif